Vapor-generator.



No. 755,988. I PATENTED MAR. 29, 1904.

' J. ANDREWSL VAPOR GENERATOR.

APPLICATION FILED JAN. 21, 1903. N0 MODEL.

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J. ANDREWS.

VAPOR GENERATOR.

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PATEN TED MAR. 29,- 1904.

J. ANDREWS. VAPOR GENERATOR.

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Patented March UNITED STATES P TE T OFFICE.

J AMES-ANDREWS, OF OATHCART, SCOTLAND.

VAPOR-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 7 55,988, dated March29, 1 904:. Appli ation fil d January 21,1903. Serial No. 139,953. (Noniodel.)

T0 00% whom it may concern.-

Be it known that 1, JAMES ANDREWS, a subject of the King ofGreatBritain, and a resident of Cathcart, Scotland, have invented a newand Improved Vapor-Generator, of which the following is a full, clear,and exact description.

This invention relates to a means by which the temperature of one fluidmay be transmitted to another without bringing the fluids into actualcontact. It is useful in many connections, as will be apparent topersons skilled in the art, among which connections may be stated theuse of the invention as an evaporator, water-heater, or condenser.

The prime object of the invention is to eflect a thoroughly-rapidcirculation of the fluid the temperature of which is to be transmitted,so that a greater amount of heat may be transmitted in a given time.

To this end the principal feature of the invention resides in providinga receptacle for one fluid and means in this receptacle furnishing acontinuous or endless passage for the other fl uid, together withdevices for causing a continuous movement of the fluid through saidendless passage. 1

The invention also resides in various minor features, all of which willbe fully brought out hereinafter.

This specification is an exact description of two forms of my invention,while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming apart ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a front elevation of one form of my invention, showing itadapted as an evaporator for sea-water. Fig. 2 is a sectional view onthe line 2 2 of Fig. 1. Fig. 3 is a sec: tional view on the line 3 30fFig. 2. Fig. 4 is a sectional view of the injector, which is utilized toenforce the movement of the circulating fluid. Fig. 5 is an elevationalview, with parts in section, showing a tank and ballcock to regulate theoverflow from the circulating-fluid passage, and Fig. 6 is a sectionalview, of a second form of the injector.

Referring now to Figs. 1 to 4, 10 indicates the shell or receptacle inwhich the water to 'tion-passage.

be evaporated is placed. 11 indicates a suitable manhole and covering topermit access to the interior of the shell. 12 indicates a suitablesafety-valve, 13 a pressure-gage, and 14 a valve-controlled passage forcarrying 013? the vapor generated. 15 indicates the waterinlet valve, 16the valve for drawing off the brine, and 17 the blow-off cock. 18indicates a water-tube and connections for indicating the level of waterwithin the shell. 19.and 20 indicate, respectively, an outer and innercoil of pipe, disposed vertically in the lower part of the shell 10 andconnected with each other at their lower ends by a bend 22. From thisbend passes a drain-pipe 23, running to the exterior of the casing andcontrolled by a cook 24:. The upper ends of the pipes, 19 and 20 arejoined by suitable connections 21, respectively,

with the passages 25 and 26 of the injector 27, which has its basefastened to the shell. This injector, as best shown in Fig. 1, comprisesthe passages 25 and 26, of which the former is the injecting-passage andthe latter the suc- 28 indicates the nozzle through which the steam orother fl-uid is introduced into the injector, this nozzle passing intothe passage 25, as shown, and the passage 26 discharging into thepassage 25 outward from the mouth of the nozzle 28.} With said nozzle 28is connected the steam-supply pipe 29, as shown in Fig. 1. Now it willbe seen that steam being introduced into the injector will create afluid movement through the passage 25 into the outer pipe or coil 19 inthe direction indicated by the arrow in Fig. 3. Simultaneously a suckingeflect will be indicated in the passage 26, and these movements jointlywill enforce a circulation in the pipe 20 in the direction indicatedbythe arrow in Fig. 3. The pipes 19 and 20, with their appurtenances,therefore form a continuous or endless fluidpassage, and the injector27, working as described, will enforce a continuous fluid movementthrough this passage.

In the operation of the invention, assuming it to be used as a sea-waterevaporator, the water is introduced intothe lower part of the shell tothe desired height and the pipes 19 and 20 may be either filled withwater or they may be allowed gradually to fill by the condcnsation ofsteam. In either case the steam is turned on from the pipe 29 and afluid circulation is established and maintained in the pipes 19 and 20and their connections. The excess fluid from the water of condensationmay be drawn off from the cock 24 as occasion requires.

indicates a cylindrical partition, which is placed in the lower part ofthe shell and incloses the pipes 19 and 20, this partition enforcing acirculation of the water upward through the pipes and outward anddownward between the sides of the shell and the said partition.

The construction shown in Fig. 5 illustrates a tank and ball-cock forautomatically drawing off the excess fluid in the circulating-coils. 31indicates this tank, and 32 indicates a ballcock and its connections,the same communicating with a suitable means for conducting off theoverflow. 27 indicates the injector, and 19 and 20 indicate,respectively, pipe connections for leading the circulating fluid to andfrom the tank 31. By this arrangement the fluid moving through the coils19 and 20 is forced to pass through the tank 31, and as the liquid inthe coils increases from the condensation of the steam the level of thewater in the tank 31 will rise, and the ballcock 32 should be adjustedto discharge all water rising above a certain level. In this manner thedischarge of the water of condensation will be automatically efl ected.

Fig. 6 indicates an injector for facilitating the simultaneous use ofsteam under both high and low pressure. In this construction 25indicates the injecting-passage, and 26 the suction-passage. 33indicates the high-pressure nozzle, and 345 the low-pressure nozzle, thenozzle 33 being passed through the nozzle 34: and both nozzles beingintroduced into the injecting-passage 25. 35 indicates a steamconnection for the high-pressure nozzle, and 36 indicates the steamconnection for the lowpressure nozzle. 37 is a needle-valve controllingthe high-pressure nozzle. By the application of a suitable valve to theconnections 35 and 36 the nozzles may be used independently orsimultaneously, as will be apparent.

Various changes in the form, proportions, and minor details of myinvention may be resorted to at will without departing from the otherend of the coils and having its injecting passage in communication withone of said coils and its suction-passage communicating with the othercoil.

2. The combination of a fluid-receptacle, means constituting acontinuous or endless passage in the said receptacle, means forenforcing a continuous fluid movement through said endless passage, anda partition inclosing the said means forming the endless passage, saidpartition being spaced from the sides of the receptacle, for the purposespecified.

3. The combination of a fluid-receptacle, means constituting acontinuous or endless passage in the said receptacle, means forenforcing a continuous fluid movement through said endless passage, andmeans for automatically drawing off the excess fluid from the saidendless passage.

4. The combination of a fluid-receptacle, means constituting acontinuous or endless passage in the said receptacle, means forenforcing a continuous fluid movement through said endless passage, andmeans for automatically drawing off the excess fluid from the saidendless passage, said means for automatically drawing olf the excessfluid comprising a tank communicating with the endless passage and aball-cock commanding an outlet from said tank.

5. The combination with a shell or drum, of a coil of pipe therein, theends of the coil passing to openings in the shell, and an injectorhaving its base fastened to the shell with its injection and suctionpassages respectively in communication with said openings.

6. The combination of a shell, two coils arranged therein, said coilsbeing in communication with each other at one end and having their otherends passed into communication with openings in the shell, and aninjector having its base fastened to the shell and having J OHN W.MoFALL, R0131. THOMSON.

